Where Is The Microsoft Outlook Pst Stored In Mac

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Jul 18, 2019 Export Outlook for Mac 2016 to Windows Outlook PST Eric Simson Updated on July 18, 2019 Outlook For Mac 2 Comments 3 min read To understand the concept of exporting Outlook for Mac 2016 to Windows Outlook PST, you should know the file format supported by both of Outlook. Apr 17, 2017 Where are Outlook data files stored? Every time I change to a new PC I have set up MS Outlook and then replace the Outlook pst file with a copy from the old PC so that I get an exact copy on the new PC of all my emails, contacts etc. Microsoft Outlook stores these items in a personal-storage-table (.pst) or off-line-storage-table (.ost) files that are located on the local computer. Most commonly, the.pst files are used to store archived items and the.ost files to maintain off-line availability of the items. This is an essential feature of Microsoft Outlook. Jan 25, 2019 Outlook for Mac works with Microsoft Exchange, Office 365, Outlook.com (including Hotmail and MSN), Gmail, Yahoo Mail, and iCloud Learn more about Office 365 Office 365 is a cloud-based subscription service that brings together premium versions of Word, Excel, PowerPoint, Outlook and OneDrive, with the best tools for the way people work today. Jul 05, 2017 In the “Account Settings” window, on the “Data Files” tab, select the account you want to investigate and then click the “Open File Location” button. Outlook will open a File Explorer window showing the folder containing your PST file (or OST file if you selected an account that uses one).

When you use Microsoft Outlook, your email messages, calendar events, tasks, and other items are saved on a mail server, on your computer, or both. Outlook items that are saved on your computer are kept in an Outlook data file.

About:

There are two types of Outlook data files used by Outlook for Windows. An Outlook Data File (.pst) is used for most accounts. If you are using a Microsoft Exchange account, your items are usually delivered to and saved on the mail server. To allow you to work with your messages even when you cannot connect to the mail server, a second type of data file that is named an Offline Outlook Data File (.ost) is kept on your computer.

The primary differences between the two types of Outlook data files are as follows:

Outlook Data Files (.pst) are used for POP3, IMAP, and web-based mail accounts. When you want to create archives or back up your Outlook folders and items on your computer, such as Exchange accounts, you must create and use additional .pst files.
Offline Outlook Data Files (.ost) are used when you have an Exchange account and want to work offline or use or use the default Cached Exchange Mode. This type of data file is also used for accounts that you set up with the Outlook Connector for Outlook.com (formerly Hotmail). Outlook Data Files (.ost) are always copies of items that are saved on a mail server and do not have to be backed up like Outlook Data Files (.pst).

Introduction to Outlook Data Files (.pst and .ost).

More about .pst files
- A Personal Folders file (.pst) is an Outlook data file that stores your messages and other items on your computer. This is the most common file in which information in Outlook is saved by home users or in small organizations. Home users usually use an Internet service provider (ISP) to connect to the Internet. The ISP also provides one or more email accounts. The most common types of accounts are referred to by their Internet protocol names: POP3 and IMAP. Another type of account is an HTTP or web-based account that works similar to IMAP email accounts. All three account types use a .pst file.
  Your items can also be moved or archived to an Outlook Data File (.pst). Because a .pst file is kept on your computer, it is not subject to mailbox size limits on the mail server. By moving items to a .pst file on your computer, you can free up storage space in the mailbox on your mail server. Outlook can be configured to deliver new items to a .pst file, but if you do this, it has several disadvantages. This includes being unable to work with your items when you are using Microsoft Outlook Web Access with the Exchange Server email account or when you are working on another computer.
  Warning Do not access an Outlook Data File (.pst) from a network share or another computer, because it increases the possibility of data loss.
  Tip You should regularly back up your Outlook Data Files (.pst) and save them in a safe place. Your ISP or Microsoft cannot recover your e-mail or other items if the file is lost.

More about .ost files
- Typically, when you use a Microsoft Exchange Server account, your email messages, calendar, and other items are delivered to and saved on the server. You can configure Outlook to keep a local copy of your items on your computer in an Outlook data file that is named an Offline Outlook Data File (.ost). This allows you to use Cached Exchange Mode or to work offline when a connection to the Exchange computer may not be possible or wanted. The .ost file is synchronized with the Exchange computer when a connection is available.
  Offline folders are replicas of the folders found in your mailbox on the computer that is running Microsoft Exchange. They make it possible to take a folder from a server location, work with the contents of the folder when you are not connected to the network, and then, when you are connected again, update the folder and its corresponding server folder to make the contents of both folders identical. This process is known as synchronizing folders.
  You can add, delete, and change the contents of an offline folder exactly as you can for a folder on a server. For example, you can change and move items between folders, send messages that are included in your offline Outbox, and view the contents of your offline public folders. Meanwhile, new messages are kept in your Inbox on the server, and other people might add, delete, and change items in public folders. You will not be aware of these changes on the server until you synchronize.
  The information that is synchronized includes the following:
  - Headers For email items only, a header is a descriptive identifier that provides the sender's name, the subject line of the message, the time when the message was received, and the size of the message.
  - Full items A full item includes the header, the body of the message, and any attachments, such as embedded objects or pictures.
  When you work offline, folders that are synchronized are determined by Send/Receive groups. By using Send/Receive groups, you can choose which folders are synchronized and kept current so that when a connection to the server is not possible or you choose to work offline, you can continue to work with those items. You can also specify that updates to the Address Book be downloaded during synchronization.
  If you use an Exchange Server email account (like all UW-Madison Office 365 users), we recommend that you use Cached Exchange Mode. Most of the reasons to work offline are eliminated when you use Cached Exchange Mode. The lack of a network connection is almost transparent to you because you can continue to work with your items whether you are connected to the computer that is running Exchange.
  By default, Cached Exchange Mode creates and uses an Offline Folder file (.ost) and then downloads and maintains a synchronized copy of the items in all folders in your mailbox. You work with the information on your computer, and Outlook synchronizes the information with the server. When your connection to the Exchange computer is interrupted, you can continue to work with your data. When a connection is restored, changes are automatically synchronized, and the folders and items on the server and on your computer are identical again.
  With Cached Exchange Mode, you do not have to set up Send/Receive groups, choose folders that you want to be available offline, and then keep those folders synchronized.

File locations:

You can save, copy, and move a data file (other than the file that is used as your default delivery location) to another location on your computer or to a share on the network. However, you must have folder read/write permissions to open an Outlook Data File (.pst).

Outlook Data Files (.pst)
- Note Microsoft Exchange Server accounts save your information on the mail server. To use Cached Exchange Mode or to work offline, copies of your items are saved in an offline Outlook Data File (.ost). See the Outlook Data Files (.ost) section for more information. Also, some organizations allow you to export or archive your items to a .pst file.
  The fastest way to open the folder where your Outlook Data File (.pst and .ost) is saved is to do the following:
  1. In Outlook, click the File tab.
  2. Click Account Settings, and then click Account Settings.
  3. On the Data Files tab, click an entry, and then click Open Folder Location.
  If you are unable to open Outlook, you can navigate to the follow locations to find the files manually.
  Windows 10 drive:Users<Your Name>AppDataLocalMicrosoftOutlook
  Windows 8 and 8.1 drive:Users<Your Name>AppDataLocalMicrosoftOutlook
  Windows 7 and Windows Vista drive:Users<Your Name>AppDataLocalMicrosoftOutlook
  Windows XP drive:Documents and Settings<Your Name>Local SettingsApplication DataMicrosoftOutlook
  Note: If you are unable to view the folder named 'AppData' in your user folder, this is because you do not have the proper permissions to view this folder. If you click the address bar at the top of the File Explorer window, you can type in the location manually.
  Microsoft bluetooth mouse pairing with mac. Connect a Bluetooth device with your Mac. Make sure the device is turned on and discoverable (see the device’s manual for details). On your Mac, choose Apple menu System Preferences, then click Bluetooth. Open Bluetooth preferences for me. Select the device in the list, then click Connect. Oct 17, 2019 Bluetooth is a wireless technology that makes short-range connections between devices (like your Mac, and a mouse or keyboard) at distances up to 10 meters (approximately 30 feet). And with Bluetooth, your iPhone or iPad can create a 'Personal Hotspot' to provide Internet access for your Mac through your wireless service provider. Sep 11, 2018 I got an old (late 2011) MacBook Pro at work and when i tried to pair my Microsoft Designer Mouse with it it doesn't even show up in the Bluetooth preferences. The thing is I have a MacBook Pro at home. Also late 2011. And I can pair the mouse with it. Nov 18, 2016 How to pair a Bluetooth mouse or keyboard with your Mac Click on the Apple logo in the top left corner of your screen. It looks like this . Click on System Preferences. Click on Bluetooth. It's the funky-looking 'B' in the blue oval. Click on the Turn on Bluetooth button if Bluetooth is not.
  To repair this data file, review Microsoft's documentation.

Offline Outlook Data File (.ost)
- The .ost file is synchronized with the items on the server that runs Exchange. Because your data remains on the Exchange server, you can re-create this .ost file on your new computer without having to back up the .ost file.
  Windows 10 drive:Users<Your Name>AppDataLocalMicrosoftOutlook
  Windows 8 and 8.1 drive:Users<Your Name>AppDataLocalMicrosoftOutlook
  Windows 7 and Windows Vista drive:Users<Your Name>AppDataLocalMicrosoftOutlook
  Windows XP drive:Documents and Settings<Your Name>Local SettingsApplication DataMicrosoftOutlook
  Note: If you are unable to view the folder named 'AppData' in your user folder, this is because you do not have the proper permissions to view this folder. If you click the address bar at the top of the File Explorer window, you can type in the location manually.
  To repair this data file, review Microsoft's documentation.

Additional files:

Outlook also saves data in the following formats.

Personal Address Book (.pab)
- Personal Address Book (.pab) files are lists of names and distribution lists, used in Outlook 2003 and earlier versions. To use them in Outlook 2016 for Windows, convert the files from one of the following default locations into a contacts folder by clicking File > Open & Export > Import or Import/Export.
  - drive:UsersusernameAppDataLocalMicrosoftOutlook

Offline Address Book (.oab)
- The Offline Address Book (.oab) is used by Microsoft Exchange Server accounts. It contains information, such as names, e-mail address, titles, and office locations, from the Global Address List (GAL) on an organizationâ€™s Exchange server.
  You don't have to back up or restore this file as it is created and updated automatically by the server.
  - drive:UsersusernameAppDataLocalMicrosoftOutlook

Navigation Pane settings (.xml)
- - drive:UsersusernameAppDataRoamingOutlookprofile name.xml

Registered Microsoft Exchange extensions (.dat)
- - drive:UsersusernameAppDataLocalMicrosoftOutlook

Print styles (Outlprnt with no file extension)
- - drive:UsersusernameAppDataRoamingMicrosoftOutlook

Signatures (.rtf, .txt, .htm)
- - drive:UsersusernameAppDataRoamingMicrosoftSignatures

Stationery (.htm)
- - drive:Program FilesCommon FilesMicrosoft SharedStationery

Custom Forms
- - drive:UsersusernameAppDataLocalMicrosoftForms

Dictionary (.dic)
- - drive:UsersusernameAppDataRoamingMicrosoftUProof

Templates (.oft)
- - drive:UsersusernameAppDataRoamingMicrosoftTemplates

Send/Receive settings (.srs)
- - drive:UsersusernameAppDataRoamingMicrosoftOutlook

Message (.msg, .htm, .rtf)

To export to an Outlook for Mac Data File (.olm), please use Microsoft's documentation.

About:

Outlook 2016 for Mac stores messages and other items, such as calendar events, contacts, tasks, and notes, as a SQLite database on your computer. If you turn on Time Machine, it automatically makes copies of every file on your computer on a regular basis. If a file gets damaged or lost, you can use Time Machine to browse through the backups and recover the copy of the file. Otherwise, you can manually archive your messages to an Outlook for Mac Data File (.olm).

File locations:

All Outlook for Mac items can be found in the SQLite database located at: /Users/username/Library/Group Containers/UBF8T346G9.Office/Outlook/Outlook 15 Profiles.

To export to an Outlook for Mac Data File (.olm), please use Microsoft's documentation.

Overview[edit]

In Microsoft Exchange Server, the messages, the calendar, and other data items are delivered to and stored on the server. Microsoft Outlook stores these items in a personal-storage-table (.pst) or off-line-storage-table (.ost) files that are located on the local computer. Most commonly, the .pst files are used to store archived items and the .ost files to maintain off-line availability of the items. This is an essential feature of Microsoft Outlook.

The size of these files no longer counts against the size of the mailbox used; by moving files from a server mailbox to .pst files, users can free storage space on their mailservers.^[1] To use the .pst files from another location the user needs to be able to access the files directly over a network from his mail client. While it is possible to open and use a .pst file from over a network, this is unsupported, and Microsoft advises against it, as .pst files are prone to corruption when used in this manner.^[2]

Both the .pst and .ost files use a fixed-block-based allocation scheme; the file is enlarged by a fixed amount of bytes, and the file internally maintains information about the allocated and non-allocated blocks. So, when data files like email messages are added to a .pst file, its file size is automatically adjusted by the mail client (if necessary). When mail is deleted from a .pst file, the size of the .pst file will stay the same, marking the space as unallocated so that it will hold future data items. Recently removed data items can actually be recovered from .pst and .ost files.

To reduce the size of .pst files, the user needs to compact them.^[3]

Data access[edit]

Password protection can be used to protect the content of the .pst files.^[4] However, Microsoft admits that the password adds very little protection, due to the existence of commonly available tools which can remove or simply bypass the password protection.^[5] The password to access the table is stored without the first and last XOR CRC-32 integer representation of itselfin the .pst file. Outlook checks to make sure thatit matches the user-specified password and refuses to operate if there isno match. The data is readable bythe libpst project code.

Microsoft (MS) offers three values for the encryption setting: none,compressible, and high.

None the .pst data is stored as plain text.
Compressible the .pst data is encrypted with a byte-substitution cipher with a fixed substitution table.
High (sometimes called 'better') encryption is similar to a WWII German Enigma cipher with three fixed rotors.

Note that neither of the two encryption modes uses the user-specified password as any part of the key for the encryption.

Support[edit]

The .pst file format is supported by several Microsoft client applications, including Microsoft Exchange Client, Windows Messaging, and Microsoft Outlook; in the previous two, it was often used with a Personal Address Book (.pab) file, which stores address book. The .pst file format is an open format for which Microsoft provides free specifications and irrevocable free patent licensing through the Open Specification Promise^[6]

The libpst project includes tools to convert .pst files into open formats such as mbox and LDAP Data Interchange Format. libpst is licensed under the GPL and is now included in Fedora 10. MVCOM is a commercially licensed COM Component that provides access to .pst files without MAPI.

There are tools to convert .pst to other formats or to upload to other online e-mails like Gmail, for example.^[7]

Formats and size[edit]

The file is structured as a B-tree with 512 byte nodes and leaves.^[8]

Outlook 2002 and earlier use ANSI (extended ASCII with a codepage) encoding for their .pst and .ost files. This format has a maximum size of 2 GB (2³¹ bytes) and does not support unicode. A file exceeding this size is likely to give error messages, such as '.pst has reached maximum size limit,' and could become corrupted. Although superseded, this format continues to be supported by Microsoft Outlook 97 and later (98, 2000, 2002 (XP), 2003, 2007), by Internet Message Access Protocol Version 4rev1 (IMAP4) accounts and by HTTP accounts.^[9]

From Outlook 2003 and onward, the standard format for .pst and .ost files is Unicode (UTF-16 little-endian). The use of 64-bit pointers instead of the 32-bit pointers of the earlier version allowed to overcome the 2 GB limit. Now, there is a user-definable maximum-file size: up to 20gb for Outlook 2003-2007, and 50gb since Outlook 2010. ^[10]This format is supported by Microsoft Outlook 2003 and later.^[9]^[11] A file that is created in the personal-folders format in Outlook 2003 or in Microsoft Office Outlook 2007 is not compatible with earlier versions of Microsoft Outlook and cannot be opened by using those older versions.^[1]If this limit is reached or sometimes exceeded, retrieval of the .pst file can be difficult if not impossible.

According to documentation from Microsoft, all PST files begin with the four-byte magic string '!BDN', a four-byte CRC number, and a two-byte magic string of 'SM'.^[12]

Microsoft Outlook Download

As with any file, .pst files can become corrupted. Prior to Outlook 2003, the default .pst file format was ANSI and had a maximum size of 2 GB. If the .pst file were allowed to grow over 2 GB, the file would become unusable. Microsoft provides PST2GB, a tool that can be used to truncate a .pst file that has grown over 2 GB. Microsoft also provides scanpst.exe, that can be used to repair other .pst file-corruption issues. In Outlook 2003 and 2007, .pst files are created in the Unicode format and have a default maximum size of 20 GB.

Entourage and Outlook for Mac[edit]

Microsoft Entourage is Microsoft's email and personal information program for Mac OS X. While superficially similar to Outlook, it is an entirely different application, and uses a unique database format which cannot be imported or exported, though user data can be imported and exported to and from another unique format called .rge (a bundle consisting of many individual files plus metadata). Entourage 2008, the current version as of May 2010, has no support for .pst files, though there exists Microsoft's .pst import tool for Entourage 2004; however, the tool could only import .pst files from Outlook for Mac 2001, and not any Windows versions. Entourage is being replaced by Outlook for Office 2011 for Intel Macs, which will be able to import Outlook .pst files from Windows;^[13] however, data will be stored as many individual files, rather than in a single database such as .pst or the Entourage database.

Outlook for Mac 2001, which runs under Mac OS 9 or the Mac OS X Classic Environment, connects exclusively to Exchange servers, and to this day is closer to its Windows counterpart than Entourage is. It works directly with 'Outlook 97-2002' .pst files, and can freely interchange those files with Outlook for Windows, as recent versions are still compatible with the older .pst format.The limit for Outlook 2011 is 10GB.